No idea what's happening in the GPL world but these two videos have recently been uploaded to youtube and they are of a BRM H16 being started and revved up a bit at the Goodwood festival of Speed last year. Thought you might like to see and hear them.

Hoho, that's intreeintro intriguing!
I'll have to wait till I'm home to play this soundtrack though. I'm pretty sure my office buddies are not the kind to enjoy a high-revving H16 while they're working on their memoirs ...